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<p>下面是 JavaScript 1.4 的更新记录，它只可用于 1999 年发布的 Netscape 服务端 JavaScript。 旧的 Netscape 文档可在 <a class="external" href="https://web.archive.org/web/20040802225238/http://developer.netscape.com/docs/manuals/js/core/jsref/index.htm" rel="noopener">archive.org</a> 找到。</p>
<h2 id="JavaScript_1.4的新特性">JavaScript 1.4的新特性</h2>
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<li>异常处理 (<a href="/en-US/docs/Web/JavaScript/Reference/Statements/throw"><code>throw</code></a> 和 <a href="/en-US/docs/Web/JavaScript/Reference/Statements/try...catch"><code>try...catch</code></a>)</li>
<li><code><a href="/en-US/docs/Web/JavaScript/Reference/Operators/in">in</a></code> 运算符</li>
<li><a href="/en-US/docs/Web/JavaScript/Reference/Operators/instanceof"><code>instanceof</code></a> 运算符</li>
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<h2 id="JavaScript_1.4的功能改动">JavaScript 1.4的功能改动</h2>
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<li><code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval" title="JavaScript/Reference/Global_Functions/Eval">eval()</a></code> 的改动 (不能被间接唤起，也不再是Object的一个方法)</li>
<li><code><a href="/en-US/docs/Web/JavaScript/Reference/Functions_and_function_scope/arguments" title="JavaScript/Reference/Functions/arguments">arguments</a></code> 不再是函数的属性</li>
<li>废除了 <a href="Reference/Global_Objects/Function/arity" title="返回一个函数的形参数量."><code>Function.arity</code></a> 以支持 <a href="Reference/Global_Objects/Function/length" title="此页面仍未被本地化, 期待您的翻译!"><code>Function.length</code></a></li>
<li><a href="/en-US/docs/Archive/Web/LiveConnect">LiveConnect</a> 的改动</li>
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